<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>布局</title>
    <link rel="stylesheet" href="../../css/bootstrap.css">
    <link rel="stylesheet" href="../../bootstrap-icons-1.13.1/bootstrap-icons.min.css">
    <style>
        .dd{
            width: 100px;
            height: 100px;
        }
    </style>
</head>
<body>
    <div class="container d-flex flex-row bg-dark justify-content-center">
        <div class="dd bg-primary m-3">1</div>
        <div class="dd bg-danger m-3">2</div>
        <div class="dd bg-success m-3">3</div>
    </div>
</body>
</html>